Fitted bedding

ABSTRACT

A fitted bed sheet corresponding in size and shape to a top surface of a mattress, the bed sheet having an upper peripheral edge, a lower peripheral edge disposed below the upper peripheral edge, a channel positioned about the lower peripheral edge, at least one adjustable elastic cord disposed within the channel, and one or more locking mechanisms associated with the adjustable elastic cord to secure the adjustable elastic cord at a selected length. A partially fitted bed sheet has two corners at a first end and an opening at a second end, the two corners having at least one elastic cord associated therewith and being configured to partially secure the bed sheet to a mattress. A blanket or comforter is partially fitted to a mattress with an elastic fabric component having an adjustable elastic cord disposed about a lower peripheral edge thereof.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to and the benefit of U.S. Provisional Application No. 63/177,127, filed Apr. 20, 2021, and entitled Fitted Bedding, the entire content of which is incorporated herein by reference.

BACKGROUND Technical Field

This disclosure generally relates to fitted bedding. More specifically, the present disclosure relates to bottom or fitted bed sheets, top or flat sheets, covers, blankets, and duvets.

Related Technology

Conventional bedding generally includes a bottom sheet for protecting a mattress, a blanket or comforter for providing warmth and comfort, and a top sheet between the bottom sheet and the blanket or comforter for added comfort and for protecting the blanket or comforter.

Intended to separate the body of a user from the mattress, bottom sheets are generally secured to the mattress by either folding the corners of the bottom sheet around and under the four corners of the mattress, or by use of a fitted sheet having pre-sewn corners and an elastic configured to wrap around each corner of the mattress. The first method requires time and skill to properly fold the sheet about each corner of the mattress as a poorly installed bottom sheet can become undone when the user shifts about on the mattress. Conventional fitted sheets can also be difficult to install as the elastic must be stretched as the sheet is wrapped around the four corners of the mattress. Also, generic sizes of fitted sheets can be particularly difficult to install and poorly retained due to differences in mattress thickness. For example, it may be difficult or impossible to secure a standard fitted sheet on a thicker mattress or a mattress with a pillow top. In contrast, a fitted sheet that is made for use with a thicker mattress may fit too loosely on a standard or thinner mattress, resulting in the fitted sheet becoming loose or disconnected from the mattress.

Top sheets and blankets or comforters also present issues with retention as the user shifts about beneath them during sleep. In an attempt to retain the position of the top sheet, users generally fold the lower end thereof about the lower end and lower corners of the bed. Some do the same with the blanket or comforter to ensure they remain in position over the foot of the bed. Folding bedding under the end of a mattress can be arduous and generally provides poor retention of the bedding during use.

Accordingly, there are a number of disadvantages with bedding that can be addressed.

BRIEF SUMMARY

Implementations of the present disclosure solve one or more of the foregoing or other problems in the art with fitted bedding.

In one example embodiment, a fitted bed sheet is adapted to cover a mattress. The fitted bed sheet includes a planar portion corresponding in size and shape to a top surface of the mattress. A perimeter of the planar portion defines an upper peripheral edge of the fitted bed sheet. A lower peripheral edge is disposed below the upper peripheral edge. A plurality of sides separate the upper peripheral edge from the lower peripheral edge. At least one adjustable cord is disposed at the lower peripheral edge. The adjustable cord is configured to selectively adjust and maintain a dimension of the lower peripheral edge to secure the fitted bed sheet to the mattress.

In another example embodiment, a partially fitted bed sheet includes a planar portion defining an upper peripheral edge. The upper peripheral edge has a shape and size that generally corresponds to a shape and size of a top surface of the mattress. A lower peripheral edge is disposed below the upper peripheral edge. Three side portions extend between the upper and lower peripheral edges. Edges of adjacent side portions are joined together to form first and second fitted corners at a first end of the partially fitted bedsheet. Free edges of the planar portion and two of the three sides cooperate to form an opening at a second end of the partially fitted bedsheet, the opening being configured to have the mattress disposed therein and extend therefrom. At least one cord is disposed along a portion of the lower peripheral edge and across the first and second fitted corners formed by the three sides. The at least one cord is configured to conform the lower peripheral edges adjacent to the fitted corners with one more corners of the mattress to partially secure the partially fitted bed sheet to the mattress.

In another example embodiment, a blanket or comforter includes an insulation layer sized and shaped to substantially cover the mattress. A mattress interface is secured to or extends from an underside of the insulation layer proximate a first end of the insulation layer. The mattress interface is configured to wrap around two corners of the mattress to partially secure the first end of the insulation layer to the mattress. One or more cords associated with the mattress interface are configured to secure the mattress interface around the mattress.

Accordingly, improvements in fitted bedding are disclosed.

This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an indication of the scope of the claimed subject matter.

Additional features and advantages of the disclosure will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the disclosure. The features and advantages of the disclosure may be realized and obtained by means of the instruments and combinations particularly pointed out in the appended claims. These and other features of the present disclosure will become more fully apparent from the following description and appended claims or may be learned by the practice of the disclosure as set forth hereinafter.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to describe the manner in which the above recited and other advantages and features of the disclosure can be obtained, a more particular description of the disclosure briefly described above will be rendered by reference to specific embodiments thereof, which are illustrated in the appended drawings. It is appreciated that these drawings depict only typical embodiments of the disclosure and are not therefore to be considered to be limiting of its scope.

The disclosure will be described and explained with additional specificity and detail through the use of the accompanying drawings in which:

FIG. 1A illustrates a top perspective view of a fitted bed sheet according to one or more embodiments of the present disclosure.

FIG. 1B illustrates a bottom perspective view of the fitted bed sheet of FIG. 1A.

FIG. 2A illustrates a top perspective view of top sheet according to one or more embodiments of the present disclosure.

FIG. 2B illustrates a bottom perspective view of a lower end of the top sheet of FIG. 2A.

FIG. 3A illustrates a bottom perspective view of a blanket or comforter according to one or more embodiments of the present disclosure.

FIG. 3B illustrates another bottom perspective view of the blanket or comforter of FIG. 3A disposed on a mattress.

DETAILED DESCRIPTION

Before describing various embodiments of the present disclosure in detail, it is to be understood that this disclosure is not limited to the parameters of the particularly exemplified systems, methods, apparatus, products, processes, and/or kits, which may, of course, vary. Thus, while certain embodiments of the present disclosure will be described in detail, with reference to specific configurations, parameters, components, elements, etc., the descriptions are illustrative and are not to be construed as limiting the scope of the claimed invention. In addition, the terminology used herein is for the purpose of describing the embodiments and is not necessarily intended to limit the scope of the claimed invention.

In addition, unless otherwise indicated, numbers expressing quantities, constituents, distances, or other measurements used in the specification and claims are to be understood as being modified by the term “about,” as that term is defined herein. Accordingly, unless indicated to the contrary, the numerical parameters set forth in the specification and attached claims are approximations that may vary depending upon the desired properties sought to be obtained by the subject matter presented herein. At the very least, and not as an attempt to limit the application of the doctrine of equivalents to the scope of the claims, each numerical parameter should at least be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the subject matter presented herein are approximations, the numerical values set forth in the specific examples are reported as precisely as possible. Any numerical values, however, inherently contain certain errors necessarily resulting from the standard deviation found in their respective testing measurements.

The terms “approximately,” “about,” and “substantially” as used herein represent an amount or condition close to the stated amount or condition that still performs a desired function or achieves a desired result. For example, the terms “approximately,” “about,” and “substantially” may refer to an amount or condition that deviates by less than 25%, by less than 10%, or by less than 5%, or by less than 1%, or by less than 0.1%, or by less than 0.01% from a stated amount or condition.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present disclosure pertains.

Embodiments of the present disclosure include fitted or partially fitted bedding that allows for easier installation compared to conventional bedding. Also, embodiments of the present disclosure present improvements in retention of the bedding once installed, thus improving user comfort as the bedding remains in an ideal configuration during use.

While the drawings accompanying this disclosure focus in part on particular types and sizes of bedding for convenience and consistency, the disclosed materials, constructions, ratios, and dimensions can be applied to different types and sizes of bedding within the scope and spirit of the present disclosure.

Referring to FIGS. 1A and 1B, top and bottom perspective views of a fitted bed sheet 100 adapted to cover a mattress 150 (shown in dashed lines). As shown in FIG. 1A, when placed upon mattress 150, fitted bed sheet 100 includes a planar portion 102 corresponding in size and shape to a top surface of mattress 150. A perimeter of planar portion 102 defines an upper peripheral edge 104. When bed sheet 100 is disposed on mattress 150, upper peripheral edge 104 of planar portion 102 may be positioned adjacent to upper peripheral edges of mattress 150.

Bed sheet 100 also includes a lower peripheral edge 106 disposed below upper peripheral edge 104 and separated therefrom by sides 108. When bed sheet 100 is disposed on mattress 150, lower peripheral edge 106 may be positioned adjacent to lower peripheral edges of mattress 150. In some embodiments, such as that shown in FIG. 1B, lower peripheral edge 106 may extend around the lower peripheral edges of mattress 150 and partially underneath mattress 150.

One or more channels 110 may be positioned about all or a portion of lower peripheral edge 106. One or more adjustable cords 112 may be disposed at least partially within the one or more channels 110 to provide for tightening of lower peripheral edge 106 about a corresponding lower perimeter of mattress 150. For instance, an adjustable cord 112 may be pulled through the one or more channels 110 and out one or more openings thereof to decrease a dimension of lower peripheral edge 106, thereby selectively securing fitted bed sheet 100 under the lower peripheral edges of mattress 150.

Embodiments of fitted bed sheet 100 can include one adjustable cord 112 encompassing the entire lower peripheral edge 106 or, alternatively, can include a plurality of adjustable cords disposed within one or more channels 110 to provide for adjustment of lower peripheral edge 106 during installation. For example, separate cords can be provided at one or more of the corners or along one or more side of lower peripheral edge 106 (which generally correspond to corners and sides of mattress 150). In such embodiments, one or more ends of the cord(s) can be attached to fitted sheet 100 (e.g., within one or more channels 110) such that when the portion(s) of the cord(s) that extend out of the channel(s) are pulled further out, the attached ends of the cord(s) pull the lower peripheral edge 106 tighter around the lower edges of mattress 150.

The adjustable cord(s) 112 may be made from any suitable material. In some embodiments, adjustable cord(s) 112 are formed of an elastic material that allows for the length of adjustable cord(s) 112 to increase or decrease depending on the force applied thereto. In other embodiments, adjustable cord(s) 112 may be formed from relatively inelastic materials, such that the length(s) thereof remain substantially constant.

As also shown in FIGS. 1A and 1B, one or more locking mechanisms 114 are associated with adjustable cords 112 to secure adjustable cords 112 (and by extension a dimension of lower peripheral edge 106) at a selected length. Each locking mechanism 114, for example, can include a crimping mechanism through which a portion of cord 112 passes. As more of cord 112 is pulled through locking mechanism (and out of channel(s) 110), cord 112 pulls on channel(s) 110, which causes lower peripheral edge 106 to contract around mattress 150. Locking mechanism(s) 114 can secure the cord 112 at a desired length to maintain fitted sheet 100 secured around mattress 150.

Installation or removal of fitted bed sheet 100 is facilitated by allowing for cord 112 to be loosened prior to placement of bed sheet 100 on mattress 150 or when bed sheet 100 is to be removed from mattress 150. For instance, locking mechanism(s) 114 can be released or loosened to allow for more of cord(s) 112 to extend into channel(s) 110. With more of cord(s) 112 disposed within channel(s) 110, the dimension of lower peripheral edge 106 can expand, thereby allowing for bed sheet 100 to be placed on or removed from mattress 150.

Bed sheet 100 may include one or more slits or pockets 116 adjacent to each locking mechanism 114. Slits or pockets 116 can be provided in or on sides 108. Slits or pockets 116 can be configured to enable insertion therein of locking mechanism(s) 114 and/or excess lengths of cord(s) 112 to conceal them from view and from interference with other bedding.

In some embodiments, as shown in FIG. 1A, one or more storage pockets 118 are disposed on one or more of sides 108 of fitted bed sheet 100 to provide for storage of small items, such as a mobile phone or other electronic device. One or more of the storage pockets 118 can include one or more holes 120 to enable insertion of a power cable therethrough.

Attention is now directed to FIGS. 2A and 2B, which illustrates a partially fitted top sheet 200. FIG. 2A illustrates a top perspective view of top sheet 200 disposed on mattress 150 and FIG. 2B illustrates a bottom perspective view of a lower end thereof.

Top sheet 200 can be partially secured to mattress 150 at a lower end 202 thereof to maintain the position of top sheet 200 while allowing for use by virtue of the upper end 204 thereof being left unsecured to mattress 150. As shown, partially fitted top sheet 200 includes a planar top portion 206 generally corresponding in size and shape to the top surface of mattress 150. A perimeter of planar top portion 206 defines an upper peripheral edge 208. When top sheet 200 is disposed on mattress 150, upper peripheral edge 208 of planar portion 206 may be positioned adjacent to upper peripheral edges of mattress 150.

Top sheet 200 also includes a lower peripheral edge 210. Lower peripheral edge 210 is disposed below upper peripheral edge 208 and is separated therefrom by three sides 212. Each of the three sides 212 has opposing ends 214 a, 214 b. The opposing ends 214 a, 214 b extend between the lower peripheral edge 210 and the upper peripheral edge 208. In the illustrated embodiment, the end 214 b of the left side 212 is connected to the end 214 a of the side 212 that extends along the foot of mattress 150, thereby forming a corner 209 a at the lower end 202 bed sheet 200. Similarly, the end 214 b of the right side 212 is connected to the end 214 b of the side 212 that extends along the foot of mattress 150, thereby forming a corner 209 b at the lower end 202 of the bed sheet 200.

The two corners 209 a, 209 b at lower end 202 can be configured to conform to two corresponding corners of mattress 150 to hold the partially fitted top sheet 200 in place over the feet of the user while in use. The corners 209 a, 209 b may be formed by sewing or otherwise attaching adjacent ends 214 a, 214 b of sides 212 together.

Top sheet 200 as depicted includes at least one cord 216 configured to further secure lower end 202 in place at the foot of mattress 150. The at least one cord 216 may include one or more elastic cords of a fixed length sewn or otherwise disposed about lower peripheral edge 210 adjacent the two corners 209 a, 209 b of lower end 202. The one or more cords 216 may secure the portion of lower peripheral edge 210 adjacent the two corners 209 a, 209 b under the lower corners of mattress 150. In some embodiments, the planar top portion 206 at the lower end 202 and the corners 209 a, 209 b may form a pocket configured to receive a lower end of mattress 150 therein and secure top sheet 200 thereto.

In other embodiments, cord 216 can be adjustable in the manner discussed above in connection with FIGS. 1A and 1B. For instance, a cord 216 may be at least partially disposed within a channel 218 that extends between adjacent sides 212 and across at least one of corners 209 a, 209 b. The channel 218 may be disposed at lower peripheral edge 210 of top sheet 200. As cord 216 is pulled further out of the channel 218, lower peripheral edge 210 of top sheet 200 adjacent to one or both of corners 209 a, 209 b may gather together, thereby securing the lower end of top sheet 200 to mattress 150. Similar to bed sheet 100, top sheet 200 may also include one or more locking mechanisms 220 configured to secure cord 216 at a desired length and one or more slits or pockets 222 in which excess cord 216 and/or locking mechanisms 220 can be disposed.

Some embodiments of partially fitted top sheet 200 also include an elastomer material, such as silicone rubber, disposed on an inside and/or outside surface of top sheet 200 proximate the two corners 209 a, 209 b thereof. The elastomeric material may provide additional friction between top sheet 200 and an adjacent object (e.g., a bedframe, box spring, mattress 150 (or any material between top sheet 200 and mattress 150, such as a fitted bottom sheet) to further secure top sheet 200 in place at lower end 202.

When positioned on mattress 150 as shown in FIG. 1A, upper end 204 of top sheet 200 may form an opening configured to receive an upper end of mattress 150 therein. The opening may be a three-sided opening, formed by the edges 214 a of opposing sides 212 and the upper peripheral edge 208 at upper end 204. The edges 214 a of opposing sides 212 and the upper peripheral edge 208 may be continuous with one another lengthwise, and may be angled relative to one another when top sheet 200 is positioned on mattress 150. Furthermore, the edges 214 a of opposing sides 212 and the upper peripheral edge 208 may be free edges, such that they are not attached along their lengths to any other portions of top sheet 200.

Thus, top sheet 200 may have a three-sided opening at upper end 204 and a fitted portion at lower end 202. The fitted portion is configured to secure top sheet 200 to mattress 150 and hold top sheet 200 is place. In contrast, the upper end 204 remains unfitted, thereby allowing a user to readily get under or out from under top sheet 200.

Attention is now directed to FIGS. 3A and 3B, which illustrate a comforter 300 having a fitted component for partially securing comforter 300 to the foot of mattress 150. FIG. 3A illustrates a bottom perspective view of the comforter 300 and FIG. 3B illustrates a bottom perspective view of the comforter 300 disposed on mattress 150.

Comforter 300 can include any manner of bedding typically used as an upper layer, such as but not limited to blankets, comforters, duvets, and the like, constructed of bedding materials such as cotton, polyester, wool, hemp, natural or artificial insulation, and so forth. As shown, comforter 300 includes an insulation layer 302, such as a down comforter or duvet configured to hold an existing comforter.

Secured to or extending from an underside of insulation layer 302 is a mattress interface 304 for partially securing comforter 300 to the foot of mattress 150. The mattress interface 304 includes opposing sides walls 306, 308, a bottom wall 310, and an end wall 312. The side walls 306, 308, bottom wall 310, and end wall 312, along with the insulation layer 302 cooperate to form a pocket 314. The side walls 306, 308, bottom wall 310, and end wall 312 can be formed from one or more separate pieces of material and secured (e.g., sewn) together along their adjacent edges, or can be formed of a single piece of material that is arranged (e.g., cut, sewn, etc.) to form the pocket 314.

As shown in FIG. 3B, the pocket 314 is sized and configured to receive an end of mattress 150 therein. More specifically, the side walls 306, 308, bottom wall 310, and end wall 312 have heights that are generally equal to the height of mattress 150, and end wall 312 has a width that is generally equal to the width of mattress 150. The lengths of side walls 306, 308 and bottom wall 310 can vary from one embodiment to another. In some embodiments, the side walls 306, 308 and bottom wall 310 can have lengths of 1 inch, 2 inches, 4 inches, 6 inches, 8 inches, 10 inches, 12 inches, or any length therebetween or greater than 12 inches.

One or more of the free edges of the side walls 306, 308 and/or the bottom wall 310 (i.e., the edges opposite to the end wall 312) may include one or more adjustable cords 316 attached thereto. The one or more cords 316 may be formed of an elastic material that allows for the length of adjustable cord(s) 112 (and, thus, the dimension(s) of the free edges of the side walls 306, 308 and/or the bottom wall 310) to increase or decrease depending on the force applied thereto.

In other embodiments, adjustable cord(s) 112 may be formed from relatively inelastic materials, such that the length(s) thereof remain substantially constant. In such embodiments, the free edges of the side walls 306, 308 and/or the bottom wall 310 may include one or more channels (similar to channels 110, 218) with the one or more adjustable cords 316 disposed at least partially therein. The one or more channels and one or more cords 316 may be configured to facilitate tightening or loosening of one or more of the free edges of the side walls 306, 308 and/or the bottom wall 310 about mattress 150. For instance, adjustable cord 112 may be pulled through the one or more channels and out one or more openings thereof to decrease a dimension of one or more of the side walls 306, 308 and/or the bottom wall 310, thereby selectively securing the mattress interface 304 under around mattress 150.

Similar to the other embodiments herein, one or more locking mechanisms 318 may be used to selectively secure the one or more adjustable cords 316 at a desired length. The mattress interface 304 may also include one or more slits or pockets (similar to slits or pockets 116, 222) in which excess cord 316 and/or locking mechanisms 318 may be disposed.

One skilled in the art should appreciate that, in view of the present disclosure, the various features and components of the embodiments disclosed herein can be implemented in a variety of combinations and, therefore, no single illustrated embodiment is limited to the specific features and components included therein.

Various alterations and/or modifications of the inventive features illustrated herein, and additional applications of the principles illustrated herein, which would occur to one skilled in the relevant art and having possession of this disclosure, can be made to the illustrated embodiments without departing from the spirit and scope of the invention as defined by the claims, and are to be considered within the scope of this disclosure. Thus, while various aspects and embodiments have been disclosed herein, other aspects and embodiments are contemplated. While a number of methods and components similar or equivalent to those described herein can be used to practice embodiments of the present disclosure, only certain components and methods are described herein.

The present disclosure may be embodied in other specific forms without departing from its spirit or essential characteristics. The described embodiments are to be considered in all respects only as illustrative and not restrictive. The scope of the invention is, therefore, indicated by the appended claims rather than by the foregoing description. While certain embodiments and details have been included herein and in the attached disclosure for purposes of illustrating embodiments of the present disclosure, it will be apparent to those skilled in the art that various changes in the methods, products, devices, and apparatus disclosed herein may be made without departing from the scope of the disclosure or of the invention, which is defined in the appended claims. All changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope. 

What is claimed is:
 1. A fitted bed sheet adapted to cover a mattress, comprising: a planar portion corresponding in size and shape to a top surface of the mattress, a perimeter of the planar portion defining an upper peripheral edge of the fitted bed sheet; a lower peripheral edge disposed below the upper peripheral edge; a plurality of sides separating the upper peripheral edge from the lower peripheral edge; and at least one adjustable cord disposed at the lower peripheral edge, the adjustable cord being configured to selectively adjust and maintain a dimension of the lower peripheral edge to secure the fitted bed sheet to the mattress.
 2. The fitted bed sheet as recited in claim 1, wherein the lower peripheral edge comprises one or more channels.
 3. The fitted bed sheet as recited in claim 2, wherein the one or more channels traverse the entire lower peripheral edge and the at least one adjustable cord comprises one cord spanning the entire channel.
 4. The fitted bed sheet as recited in claim 2, wherein the at least one adjustable cord is disposed at least partially within the one or more channels.
 5. The fitted bed sheet as recited in claim 4, wherein a length of the adjustable cord disposed within the one or more channels is selectively adjustable by pulling a portion of the adjustable cord out of the one or more channels.
 6. The fitted bed sheet as recited in claim 1, further comprising one or more locking mechanisms associated with the adjustable cord to secure the dimension of the lower peripheral edge at a selected length.
 7. The fitted bed sheet as recited in claim 6, further comprising one or more slits or pockets disposed adjacent to the one or more locking mechanisms, each slit or pocket being configured to allow one of the one or more locking mechanisms and/or a portion of the cord to pass therethrough.
 8. The fitted bed sheet as recited in claim 1, further comprising one or more storage pockets disposed on one of the sides between the upper peripheral edge and the lower peripheral edge.
 9. The fitted bed sheet as recited in claim 8, wherein each storage pocket comprises one or more openings configured to enable an electrical cable to pass therethrough.
 10. A partially fitted bed sheet for use as a top sheet on a mattress, the partially fitted bed sheet comprising: a planar portion defining an upper peripheral edge, the upper peripheral edge having a shape and size that generally corresponds to a shape and size of a top surface of the mattress; a lower peripheral edge disposed below the upper peripheral edge; three side portions extending between the upper and lower peripheral edges, wherein: edges of adjacent side portions are joined together to form first and second fitted corners at a first end of the partially fitted bedsheet; and free edges of the planar portion and two of the three sides cooperate to form an opening at a second end of the partially fitted bedsheet, the opening being configured to have the mattress disposed therein and extend therefrom; and at least one cord disposed along a portion of the lower peripheral edge and across the first and second fitted corners formed by the three sides, the at least one cord being configured to conform the lower peripheral edges adjacent to the fitted corners with one more corners of the mattress to partially secure the partially fitted bed sheet to the mattress.
 11. The partially fitted bed sheet as recited in claim 10, wherein each of the fitted corners comprises an inside surface having a slip resistant elastomer material attached thereto.
 12. The partially fitted bed sheet as recited in claim 10, wherein the at least one cord is adjustable in length.
 13. The partially fitted bed sheet as recited in claim 12, wherein the lower peripheral edge adjacent to the fitted corners comprises one or more channels in which the at least one cord is at least partially disposed.
 14. The partially fitted bed sheet as recited in claim 13, wherein a portion of the at least one cord is configured to be selectively pulled out of the one or more channels to decrease a dimension of the lower peripheral edge and secure the fitted corners around the mattress.
 15. A blanket or comforter for use on a mattress, comprising: an insulation layer sized and shaped to substantially cover the mattress; a mattress interface secured to or extending from an underside of the insulation layer proximate a first end of the insulation layer, the mattress interface being configured to wrap around two corners of the mattress to partially secure the first end of the insulation layer to the mattress; and one or more cords associated with the mattress interface, the one or more cords being configured to secure the mattress interface around the mattress.
 16. The blanket or comforter as recited in claim 15, wherein the insulation layer comprises a duvet configured to hold an existing comforter.
 17. The blanket or comforter as recited in claim 15, further comprising one or more channels disposed at one or more free edges of the mattress interface.
 18. The blanket or comforter as recited in claim 17, wherein the one or more cords are disposed partially within the one or more channels.
 19. The blanket or comforter as recited in claim 18, further comprising one or more locking mechanisms associated with the one or more cords, the one or more locking mechanisms being configured to secure the one or more cords at a selected length.
 20. The blanket or comforter as recited in claim 15, wherein the mattress interface comprises opposing side walls, a bottom wall, and an end wall. 